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Hartzell Prop Grease gun & Fittings

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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Sun Apr 11, 2010 7:27 am Post subject: Hartzell Prop Grease gun & Fittings

I've not had an issue with zerk fittings on my Hartzell with standard 

grease gun hose. However, be certain to remove the second zerk from the 

same end of the hub(you should have 2 on each end, with one on each end 

removed.) If you do not do this, you will push grease through the seals 

and start your prop hub leaking. Also be certain you are using the same 

grease that the hub has been serviced with in the past. There is 

supposed to be a sticker on the hub as to which grease to use...often 

Aeroshell #6.

Kelly

A&P/IA, KCHD in Aridzona

On 4/11/2010 7:42 AM, Tom & Cathy Ervin wrote:

 	  Quote: 	
		  



 Group,



         I thought I would break down and buy grease and a new grease 

 gun to annually grease my Hartzell prop hub...instead of bothering the 

 now retired FBO.



        The zerk fittings on the hub don't seem like they are the same 

 as automotive? The test fit against a new gun indicates a loose 

 fit....doesn't snap on like I'm used to??? Grease goes everywhere but 

 in the fittings!



       Either my new gun is defective or....as I suspect it takes a 

 special gun and fittings?????



                                         Any ideas??  Thanks, Tom in Ohio



 *  *

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

tcervin(at)embarqmail.com
Guest

Posted: Sun Apr 11, 2010 8:14 am Post subject: Hartzell Prop Grease gun & Fittings

Kelly,

       I have done everything as you have listed....maybe a fitting is plugged or the new gun is defective?

       I am using Mobil 28 which is compatible with all Shell grease....6&7. Shell has been used in the past but I like the testing data on Mobil 28. I also use Exxon Elite oils and in 100 hrs I have added 1 pint between changes.

      Looks like I may be buying a better quality gun if cleaning the zerk fittings doesn't work.

                                                       Thanks, Tom in Ohio   

---

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Sun Apr 11, 2010 8:19 am Post subject: Hartzell Prop Grease gun & Fittings

While I would try another gun, I advise strongly against using a 

different brand grease unless the hub is torn down, inspected and 

resealed. "compatible" is one thing in a gear leg or similar, and 

entirely different in a prop hub with relatively large quantity of 

grease that is going to be mixed for a long period of time.   Hartzell 

advises against mixing grease in any way. Your prop is not the place to 

be trying a new brand.

On 4/11/2010 9:13 AM, Tom & Cathy Ervin wrote:

[quote] 



    Kelly,

         I have done everything as you have listed....maybe a fitting is plugged or the new gun is defective?

         I am using Mobil 28 which is compatible with all Shell grease....6&7. Shell has been used in the past but I like the testing data on Mobil 28. I also use Exxon Elite oils and in 100 hrs I have added 1 pint between changes.

        Looks like I may be buying a better quality gun if cleaning the zerk fittings doesn't work.

                                                         Thanks, Tom in Ohio

 ---

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

Gary.A.Sobek

Joined: 09 Jan 2006
Posts: 217
Location: SoCAL USA

Posted: Sun Apr 11, 2010 8:27 am Post subject: Hartzell Prop Grease gun & Fittings

Not familiar with Mobil 28 grease. I do know that there is a TEMPERATURE constraint for AeroShell 7 when used with the Hartzell prop. You need to placard the panel that operation is not permitted below -40 outside air temperature.   My Hartzell was shipped with AeroShell 6 but the West Coast prop shop that did the overhaul used AeroShell 7. AeroShell 7 is fine for the flying that I do on the "LEFT" Coast but would want the AeroShell 6 if I lived back in Pennsylvania were I grew up and learned to fly.



Gary A. Sobek 

"My Sanity" RV-6 N157GS O-320 Hartzell,  

2,346+ Flying Hours So. CA, USA 



[quote] Date: Sun, 11 Apr 2010 12:13:26 -0400

 From: tcervin(at)embarqmail.com

 To: rv-list(at)matronics.com

 Subject: Re: Hartzell Prop Grease gun & Fittings

 

 --> RV-List message posted by: Tom & Cathy Ervin <tcervin(at)embarqmail.com>

 

   Kelly,

        I have done everything as you have listed....maybe a fitting is plugged or the new gun is defective?

        I am using Mobil 28 which is compatible with all Shell grease...6&7. Shell has been used in the past but I like the testing data on Mobil 28. I also use Exxon Elite oils and in 100 hrs I have added 1 pint between changes.

       Looks like I may be buying a better quality gun if cleaning the zerk fittings doesn't work.

                                                        Thanks, Tom in Ohio   

 ---

Gary.A.Sobek

Joined: 09 Jan 2006
Posts: 217
Location: SoCAL USA

Posted: Sun Apr 11, 2010 8:33 am Post subject: Hartzell Prop Grease gun & Fittings

My Hartzell manual says that 6 and 7 can be mixed but if you do, there is a do NOT OPERATE below -40 OAT limitation that goes with the AeroShell 7 grease. AeroShell 6 does not have that limitation.  

I agree that I would not change brands of grease without a reseal.  I would only use the grease that Hartzell lists in their manual.

Gary A. Sobek 

"My Sanity" RV-6 N157GS O-320 Hartzell,  

2,346+ Flying Hours So. CA, USA 

[quote] Date: Sun, 11 Apr 2010 09:18:18 -0700

 From: kellym(at)aviating.com

 To: rv-list(at)matronics.com

 Subject: Re: Hartzell Prop Grease gun & Fittings

 --> RV-List message posted by: Kelly McMullen <kellym(at)aviating.com>

 While I would try another gun, I advise strongly against using a 

 different brand grease unless the hub is torn down, inspected and 

 resealed. "compatible" is one thing in a gear leg or similar, and 

 entirely different in a prop hub with relatively large quantity of 

 grease that is going to be mixed for a long period of time.   Hartzell 

 advises against mixing grease in any way. Your prop is not the place to 

 be trying a new brand.

 On 4/11/2010 9:13 AM, Tom & Cathy Ervin wrote:

 > -->  RV-List message posted by: Tom&  Cathy Ervin<tcervin(at)embarqmail.com>

 >

 >    Kelly,

 >         I have done everything as you have listed....maybe a fitting is plugged or the new gun is defective?

 >         I am using Mobil 28 which is compatible with all Shell grease....6&7. Shell has been used in the past but I like the testing data on Mobil 28. I also use Exxon Elite oils and in 100 hrs I have added 1 pint between changes.

 >        Looks like I may be buying a better quality gun if cleaning the zerk fittings doesn't work.

 >                                                         Thanks, Tom in Ohio

 > ---

mcculleyja(at)starpower.n
Guest

Posted: Sun Apr 11, 2010 8:33 am Post subject: Hartzell Prop Grease gun & Fittings

Is your Hartzell prop new from the factory? It should not be a problem 

if new---NOT a used prop wherein someone could have changed the 

fittings. Mine has worked perfectly for 7 years.



Possibly someone changed the fittings, if yours is not new from 

Hartzell, OR there is a problem with your grease gun not being a 

standard configuration common to automotive grease guns.



Be sure you remove the opposite-side grease fitting as described in 

Kelly's response below.



Jim McCulley

=======================================================================================



Kelly McMullen wrote:

 	  Quote: 	
		   

 

 I've not had an issue with zerk fittings on my Hartzell with standard 

 grease gun hose. However, be certain to remove the second zerk from the 

 same end of the hub(you should have 2 on each end, with one on each end 

 removed.) If you do not do this, you will push grease through the seals 

 and start your prop hub leaking. Also be certain you are using the same 

 grease that the hub has been serviced with in the past. There is 

 supposed to be a sticker on the hub as to which grease to use...often 

 Aeroshell #6.

 Kelly

 A&P/IA, KCHD in Aridzona

 

 

 On 4/11/2010 7:42 AM, Tom & Cathy Ervin wrote:

> Group,

>

>         I thought I would break down and buy grease and a new grease 

> gun to annually grease my Hartzell prop hub...instead of bothering the 

> now retired FBO.

>

>        The zerk fittings on the hub don't seem like they are the same 

> as automotive? The test fit against a new gun indicates a loose 

> fit....doesn't snap on like I'm used to??? Grease goes everywhere but 

> in the fittings!

>

>       Either my new gun is defective or....as I suspect it takes a 

> special gun and fittings?????

>

>                                         Any ideas??  Thanks, Tom in Ohio

>

> *  *

denis.walsh(at)comcast.ne
Guest

Posted: Sun Apr 11, 2010 9:17 am Post subject: Hartzell Prop Grease gun & Fittings

What a great set of responses.

I can find nothing t disagree with so far.  These are all great pieces of information and come from the manufacturer.

Let me add one small bit of  gossip.  When my prop was overhauled the  shop put AS 7 in it.  When I asked why, since it had come with 6.  His response;   "it don't leak."

So there is a trade off between 6 and 7. My assumption is that 6 is "thinner" and 7 is "thicker".   I am very happy with the -40 degree restriction.  I wouldn't want to try starting the Lyc or the pilot at that temp, much less fly.   I do cycle the prop before take off, in the winter,  to make sure it is not sluggish. 

On Apr 11, 2010, at 10:29 , RV6 Flyer wrote:

[quote]My Hartzell manual says that 6 and 7 can be mixed but if you do, there is a do NOT OPERATE below -40 OAT limitation that goes with the AeroShell 7 grease. AeroShell 6 does not have that limitation.  

I agree that I would not change brands of grease without a reseal.  I would only use the grease that Hartzell lists in their manual.

Gary A. Sobek 

"My Sanity" RV-6 N157GS O-320 Hartzell, 

2,346+ Flying Hours So. CA, USA 

[quote] Date: Sun, 11 Apr 2010 09:18:18 -0700

 From: kellym(at)aviating.com (kellym(at)aviating.com)

 To: rv-list(at)matronics.com (rv-list(at)matronics.com)

 Subject: Re: Hartzell Prop Grease gun & Fittings

 --> RV-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

 While I would try another gun, I advise strongly against using a 

 different brand grease unless the hub is torn down, inspected and 

 resealed. "compatible" is one thing in a gear leg or similar, and 

 entirely different in a prop hub with relatively large quantity of 

 grease that is going to be mixed for a long period of time. Hartzell 

 advises against mixing grease in any way. Your prop is not the place to 

 be trying a new brand.

 On 4/11/2010 9:13 AM, Tom & Cathy Ervin wrote:

 > --> RV-List message posted by: Tom& Cathy Ervin<tcervin(at)embarqmail.com (tcervin(at)embarqmail.com)>

 >

 > Kelly,

 > I have done everything as you have listed....maybe a fitting is plugged or the new gun is defective?

 > I am using Mobil 28 which is compatible with all Shell grease....6&7. Shell has been used in the past but I like the testing data on Mobil 28. I also use Exxon Elite oils and in 100 hrs I have added 1 pint between changes.

 > Looks like I may be buying a better quality gun if cleaning the zerk fittings doesn't work.

 > Thanks, Tom in Ohio

 > ---

Larry Bowen

Joined: 09 Jan 2006
Posts: 802
Location: NC, USA

Posted: Sun Apr 11, 2010 12:12 pm Post subject: Hartzell Prop Grease gun & Fittings

The end of the grease gun is adjustable for a tighter or looser fit,

right?  Maybe its too loose on the fitting.

I stuck with the aeroshell 6, as was originally used when assembled.

On 4/11/10, Denis Walsh <denis.walsh(at)comcast.net> wrote:

[quote] What a great set of responses.

 I can find nothing t disagree with so far.  These are all great pieces

 of information and come from the manufacturer.

 Let me add one small bit of  gossip.  When my prop was overhauled the

 shop put AS 7 in it.  When I asked why, since it had come with 6.  His

 response;   "it don't leak."

 So there is a trade off between 6 and 7. My assumption is that 6 is

 "thinner" and 7 is "thicker".   I am very happy with the -40 degree

 restriction.  I wouldn't want to try starting the Lyc or the pilot at

 that temp, much less fly.   I do cycle the prop before take off, in

 the winter,  to make sure it is not sluggish.

 On Apr 11, 2010, at 10:29 , RV6 Flyer wrote:

> My Hartzell manual says that 6 and 7 can be mixed but if you do,

> there is a do NOT OPERATE below -40 OAT limitation that goes with

> the AeroShell 7 grease. AeroShell 6 does not have that limitation.

>

> I agree that I would not change brands of grease without a reseal.

> I would only use the grease that Hartzell lists in their manual.

> Gary A. Sobek

> "My Sanity" RV-6 N157GS O-320 Hartzell,

> 2,346+ Flying Hours So. CA, USA

>

> > Date: Sun, 11 Apr 2010 09:18:18 -0700

> > From: kellym(at)aviating.com

> > To: rv-list(at)matronics.com

> > Subject: Re: Hartzell Prop Grease gun & Fittings

> >

> > 

> >

> > While I would try another gun, I advise strongly against using a

> > different brand grease unless the hub is torn down, inspected and

> > resealed. "compatible" is one thing in a gear leg or similar, and

> > entirely different in a prop hub with relatively large quantity of

> > grease that is going to be mixed for a long period of time. Hartzell

> > advises against mixing grease in any way. Your prop is not the

> place to

> > be trying a new brand.

> >

> >

> > On 4/11/2010 9:13 AM, Tom & Cathy Ervin wrote:

> > > 

> > >

> >

> > >

> > > Kelly,

> > > I have done everything as you have listed....maybe a fitting is

> plugged or the new gun is defective?

> > > I am using Mobil 28 which is compatible with all Shell grease....

> 6&7. Shell has been used in the past but I like the testing data on

> Mobil 28. I also use Exxon Elite oils and in 100 hrs I have added 1

> pint between changes.

> > > Looks like I may be buying a better quality gun if cleaning the

> zerk fittings doesn't work.

> > > Thanks, Tom in Ohio

> > > ---

_________________
Larry Bowen
RV-8 SOLD,
RV-7QB in progress...

tcervin(at)embarqmail.com
Guest

Posted: Sun Apr 11, 2010 1:46 pm Post subject: Hartzell Prop Grease gun & Fittings

Mobil 28 is used by the defense industry and exceeds all Hartzell recommendations. 

                                                                         Tom in Ohio

---

tcervin(at)embarqmail.com
Guest

Posted: Sun Apr 11, 2010 1:46 pm Post subject: Hartzell Prop Grease gun & Fittings

It was new from the factory.

                          Tom in Ohio.



---

tcervin(at)embarqmail.com
Guest

Posted: Sun Apr 11, 2010 1:49 pm Post subject: Hartzell Prop Grease gun & Fittings

The gun was the problem! I had to replace the fitting on the end and now it works perfectly.

   I understand your concern with changing brands but my past experence with shell products have not been good.....won't use them.

                                                    Tom in Ohio 

---

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Sun Apr 11, 2010 4:12 pm Post subject: Hartzell Prop Grease gun & Fittings

The problem is you need to purge the Shell that is already in the hub. 

There is NOT a good way to do that. Mixing is taking a big risk.

On 4/11/2010 2:49 PM, Tom & Cathy Ervin wrote:

[quote] 



    The gun was the problem! I had to replace the fitting on the end and now it works perfectly.

     I understand your concern with changing brands but my past experence with shell products have not been good.....won't use them.

                                                      Tom in Ohio

 ---

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

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